#game-wrapper{
    display: block;
    position: relative;
}
#game-myCanvas { 
  background: #eee; 
  display: block;
  position: absolute;
  top: 0;
  left: 0;
}
#game-gameover{
  width: 480px;
  height: 320px;
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  background-color: gray;
}
#game-again{
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
#game-again span{
  margin-bottom: 20px;
  font-size: 30px;
  color: #fff;
}